​LOS ANGELES (KABC) -- A report by the American Cancer Society shows that a number of cancer deaths continue to go down because of more screenings and new treatments such as immunotherapy.

For 25-year-old Stefani Joho, her three sisters and parents are her world. Three years ago, her doctor ordered a colonoscopy because she has a family history of cancer and hadn't been feeling well for months.

During the procedure, her doctor found a large mass in her colon. She was diagnosed with stage four colon cancer. Two surgeries and rounds of chemotherapy had little effect on the cancer.